Schlumberger

Technical Paper: Anisotropic Velocity Changes in Seismic Time-Lapse Data

Society: SEG
Paper Number:
Presentation Date: 2007
 

Reservoir production causes subsurface deformations and changes in seismic velocity. These deformations and velocity changes can be monitored using time-lapse seismic data. In this study, we predict velocity changes through coupled reservoir and geomechanical modeling of the subsurface stress state and subsequent application of a rock physics model that relates changes in subsurface stress and strain to velocity changes. We expand on previously published work by investigating the anisotropy of the velocity changes and relate these to field observations of offset-dependent timelapse time-shifts from the South Arne Field.

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